the second sex battle can be found by chance in the forest. When you're at camp, click "Take a walk trough the camp's surroundings"
I think the chance is about 10%. If you can't find it for a long time, then try to do it in another chapter.
The seventh scene is on the first date with Saraith (I don't know how you might not find it). For the only choice on a date, choose "Move her slowly away by her shoulders"